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| Soil location | Total nitrogen (g/kg) | Total phosphorus (g/kg) | Total potassium (g/kg) | Alkalined nitrogen (mg/kg) | Available phosphorus (mg/kg) | Available potassium (mg/kg) | Organic matter (g/kg) |
|---|---|---|---|---|---|---|---|
| Tillage layer | 14.39 | 0.78 | 21.92 | 157.02 | 25.77 | 229.80 | 20.59 |
| Plow bottom | 7.71 | 0.65 | 20.16 | 77.53 | 16.42 | 145.84 | 14.85 |
